Frequencies for first 10,000 rows of ager variable in nhamcsed2001 dataset :

 age recode |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,091       20.91       20.91
          2 |      1,498       14.98       35.89
          3 |      3,145       31.45       67.34
          4 |      1,810       18.10       85.44
          5 |        621        6.21       91.65
          6 |        835        8.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016